It depends. Sometimes works labeled as 'Mea Culpa' are based on real events, but often they incorporate fictional elements or are entirely fictionalized.
I'm not sure specifically which 'mea culpa true story' you're referring to. 'Mea culpa' is a Latin phrase meaning 'my fault'. It could be a personal account of someone admitting their mistake in various contexts like in a relationship, at work, or in a social situation.
Without more context, it's difficult to provide the full story of 'mea culpa' in the Philippines. It could potentially be related to a political scandal, a religious matter, or an individual's admission of guilt in a particular situation. For example, if it was in a political scenario, it might involve a politician taking responsibility for a failed policy or unethical behavior.
The character of Kagura in a reincarnated fanfic can be developed through her relationships. She could form new friendships with characters from different clans. This would force her to learn about different cultures and values, which in turn would shape her character. She might also have a romantic interest in a character, and this relationship could show her vulnerable side and how she grows through love and loss.
Kagura might interact with Sakura. Sakura, being a strong - willed and intelligent kunoichi, could offer her medical expertise to Kagura if she returned injured. Or they could have a girl - to - girl talk about their respective journeys in the ninja world.